Nick Davies: The Guardian's critics say journalists cannot be trusted to judge what may damage national security. But the press's track record shows it to be more trustworthy than politicians or spooks

The Guardian has published an extensive critique of the Daily Mail and its reporting of Labour, press regulation and the Snowden leaks. We invited Mail readers to join in that debate. Paul Dacre, editor-in-chief, asked for the opportunity to comment. Here is his contribution